(well, something like that) This is an awesome instructable! I can't weld and I don't have matlab, but I just couldn't resist building this. I bought 5 sheets of poster board at the store. I set up a spreadsheet based on the .m file you provided. I designed the facets to use up the entire length of the poster board. I modified the facets so that they interlock. It is held together with white duct tape. I was most fascinated by how how it makes far away sounds sound like they are right at your ear. My kids enjoyed yelling at each other with it.

Hi Seamster, thanks for the instructable. I want to be able to weld angle iron like you did in this instructable. May I ask what kind of welding setup do you use? From what I've read it sounds like I'll need to run 220 to the garage to weld 3/16 inch angle iron. I hope that's not really the case.

Thanks for the awesome instructable. It worked out pretty easily on Ubuntu. There was one minor detail I didn't pick up from the instructions though. When I downloaded mods.zip, I extracted all the version subfolders into my .minecraft/mods folder. It turns out I needed to copy the .jar from the correct version directly into /mods. After that everything worked great.

Man, this was an awesome instructable! I'm so glad you got your mixer going. Thanks for documenting your heroic plight. I love the schematic in step 9 (3). All the analog goodness in that picture makes it clear why it was worth fighting for.

This is awesome! I have questions about casting the handle though. Did you leave the styrofoam in the mold when you poured the aluminum? I would guess the styrofoam would just evaporate. But does that cause any risk of melted aluminum blowing out of the mold? Thanks.

In my case the pole was too short so I decided to climb the tree and cut. The holes in my blade were lined up perpendicular to the length of the blade and were too far apart to use a closet rod for the handle. Instead I found a scrap of 3/4" plywood that was about right.. I just used the pole saw blade to cut a kerf down the center ply on one end. Then I used a coping saw to cut a handle shape into it. While I was using it, I realized I should have filed the corners round first.. I'll fix that later, but for today it got the job done.